Control of regenerative braking in a hybrid vehicle
First Claim
1. A method for controlling regenerative braking in a hybrid electric vehicle having an energy-storage device, a motor/generator configured to receive energy from and supply energy to the energy-storage device, and to retard the vehicle via the regenerative braking, and a controller arranged to control the regenerative braking, the method comprising:
- receiving a regenerative braking request;
detecting whether the energy-storage device is between a first predetermined state of charge and a second predetermined state of charge, wherein the energy-storage device is configured to selectively store energy up to the first predetermined state of charge and release the stored energy down to the second predetermined state of charge;
retarding the vehicle via the motor/generator and directing electrical energy from the regenerative braking to an energy dissipating device configured to dissipate energy from the regenerative braking when the energy-storage device is at or above the first predetermined state of charge and also when the energy-storage device is at or below the second predetermined state of charge; and
retarding the vehicle via the motor/generator and directing electrical energy from the regenerative braking to the energy-storage device when the energy-storage device is between the first predetermined state of charge and the second predetermined state of charge.
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Accused Products
Abstract
A method is provided for controlling regenerative braking in a hybrid electric vehicle. The vehicle includes an energy-storage device, a motor/generator configured to retard the vehicle via regenerative braking, and a controller arranged to control regenerative braking. The method includes receiving a regenerative braking request, and detecting whether the energy-storage device is between first and second predetermined states of charge. The method additionally includes retarding the vehicle via the motor/generator and directing electrical energy from regenerative braking to an energy dissipating device, if the energy-storage device is at or above the first predetermined state of charge, or at or below the second predetermined state of charge. Furthermore, the method includes retarding the vehicle via the motor/generator and directing electrical energy from regenerative braking to the energy-storage device, if the energy-storage device is between the first and second predetermined states of charge.
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Citations
20 Claims
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1. A method for controlling regenerative braking in a hybrid electric vehicle having an energy-storage device, a motor/generator configured to receive energy from and supply energy to the energy-storage device, and to retard the vehicle via the regenerative braking, and a controller arranged to control the regenerative braking, the method comprising:
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receiving a regenerative braking request; detecting whether the energy-storage device is between a first predetermined state of charge and a second predetermined state of charge, wherein the energy-storage device is configured to selectively store energy up to the first predetermined state of charge and release the stored energy down to the second predetermined state of charge; retarding the vehicle via the motor/generator and directing electrical energy from the regenerative braking to an energy dissipating device configured to dissipate energy from the regenerative braking when the energy-storage device is at or above the first predetermined state of charge and also when the energy-storage device is at or below the second predetermined state of charge; and retarding the vehicle via the motor/generator and directing electrical energy from the regenerative braking to the energy-storage device when the energy-storage device is between the first predetermined state of charge and the second predetermined state of charge. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for controlling regenerative braking in a hybrid electric vehicle having a motor/generator configured to retard the vehicle via the regenerative braking, the system comprising:
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an energy-storage device configured to receive energy from and supply energy to the motor/generator and selectively store energy up to a first predetermined state of charge and release the stored energy down to a second predetermined state of charge; an energy dissipating device configured to dissipate energy from the regenerative braking; and a controller configured to; receive a regenerative braking request; detect whether the energy-storage device is between the first predetermined state of charge and the second predetermined state of charge; retard the vehicle via the motor/generator and direct electrical energy from the regenerative braking to an energy dissipating device configured to dissipate energy from the regenerative braking when the energy-storage device is at or above the first predetermined state of charge and also when the energy-storage device is at or below the second predetermined state of charge; and retard the vehicle via the motor/generator and direct electrical energy from the regenerative braking to the energy-storage device when the energy-storage device is between the first predetermined state of charge and the second predetermined state of charge. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A hybrid electric vehicle employing a regenerative braking system, the regenerative braking system comprising:
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an energy-storage device configured to selectively store energy up to a first predetermined state of charge and release the stored energy down to a second predetermined state of charge; a motor/generator configured to receive energy from and supply energy to the energy-storage device, and to retard the vehicle via the regenerative braking; an energy dissipating device configured to dissipate energy from the regenerative braking; and a controller configured to; receive a regenerative braking request; detect whether the energy-storage device is between the first predetermined state of charge and the second predetermined state of charge; retard the vehicle via the motor/generator and direct electrical energy from the regenerative braking to an energy dissipating device configured to dissipate energy from the regenerative braking when the energy-storage device is at or above the first predetermined state of charge and also when the energy-storage device is at or below the second predetermined state of charge; and retard the vehicle via the motor/generator and direct electrical energy from the regenerative braking to the energy-storage device when the energy-storage device is between the first predetermined state of charge and the second predetermined state of charge. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification